Where can I find ISAPI-DLL entry in ApplicationHost.config file

I need to verify ApplicationHost.config file for the IIS configuration for my website, programmatically. Here I am reading the ApplicationHost.config file and making sure that all the configuration exists as per website needs. I am facing problem while verifying 'Edit Feature Permissions' for ISAPI-DLL under 'Handler Mapping'. When I change Feature Permission for ISAPI-DLL to execute I am not getting the updated value in the ApplicationHost.config file. Could someone please help me on this ?

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Solution

I solved my problem. I was looking in the wrong file. IIS made changes in the web.config file of the Application folder. So to validate whether execute permission is given to ISAPI-DLL handler I read the attribute accessPolicy of Node handlers Below are the sample xml.

<handlers accessPolicy="Read, Execute, Script">
            <remove name="ISAPI-dll" />
            <add name="ISAPI-dll" path="*.dll" verb="*" modules="IsapiModule" scriptProcessor="D:\software\_WebNeo_SQL_Sample_Site_1\rest\ttmRESTSrv.dll" resourceType="File" requireAccess="Execute" allowPathInfo="true" preCondition="bitness32" />
        </handlers>